EP 1753895 A2 20070221 - PROCESS FOR PREVENTING MEMBRANE DEGENERATION USING COMPLEXING AGENTS
Title (en)
PROCESS FOR PREVENTING MEMBRANE DEGENERATION USING COMPLEXING AGENTS
Title (de)
VERFAHREN ZUR VERHINDERUNG DER DEGENERATION EINER MEMBRAN MIT KOMPLEXBILDNERN
Title (fr)
UTILISATION D'AGENTS COMPLEXANTS POUR EMPÊCHER LA DÉGÉNERESCENCE D'UNE MEMBRANE
Publication
Application
Priority
- EP 2005052541 W 20050602
- US 57757304 P 20040608
- EP 04077826 A 20041013
- EP 05747616 A 20050602
Abstract (en)
[origin: WO2005121411A2] Membrane cell electrolysis process to prepare chlorine from an aqueous salt solution comprising the steps of dissolving a sodium chloride source in water to form an aqueous salt solution comprising sodium chloride, and dosing one or more degeneration reducing agents selected from the group consisting of monosaccharides, oligosaccharides, polysaccharides, polycarboxylic acids, polyacrylates, polymaleic acids, and derivatives thereof to said aqueous salt solution in a total amount of, on average, between 0.1 mg and 1,000 mg per litre of aqueous salt solution at a stage of the electrolysis process where the amount of active chlorine dissolved in said aqueous salt solution is less than 1.5 g per litre of aqueous salt solution and/or to the membrane cells, in order to reduce fouling and/or clogging of the membrane in said membrane cell.
IPC 8 full level
C25B 13/00 (2006.01); B01D 61/52 (2006.01); C01D 3/14 (2006.01); C02F 1/461 (2006.01); C02F 5/10 (2006.01); C25B 1/34 (2006.01); C25B 15/00 (2006.01); C25B 15/08 (2006.01); C02F 1/68 (2006.01)
CPC (source: EP)
C01D 3/145 (2013.01); C02F 1/46104 (2013.01); C25B 1/34 (2013.01); C25B 1/46 (2013.01); C25B 13/00 (2013.01); C25B 15/08 (2013.01); C02F 1/683 (2013.01); C02F 5/10 (2013.01); C02F 2201/46115 (2013.01); C02F 2201/46185 (2013.01)
Citation (search report)
See references of WO 2005121411A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005121411 A2 20051222; WO 2005121411 A3 20060608; EP 1753895 A2 20070221
DOCDB simple family (application)
EP 2005052541 W 20050602; EP 05747616 A 20050602